EXFO IQS-2400 User Manual

IQS-2400

IQS-2400 for IQS Platforms

Copyright © 2005–2008 EXFO Electro-Optical Engineering Inc. All rights
reserved. No part of this publication may be reproduced, stored in a
retrieval system or transmitted in any form, be it electronically,
mechanically, or by any other means such as photocopying, recording or
otherwise, without the prior written permission of EXFO Electro-Optical
Engineering Inc. (EXFO).

Information provided by EXFO is believed to be accurate and reliable.
However, no responsibility is assumed by EXFO for its use nor for any
infringements of patents or other rights of third parties that may result from
its use. No license is granted by implication or otherwise under any patent
rights of EXFO.

EXFO’s Commerce And Government Entities (CAGE) code under the North
Atlantic Treaty Organization (NATO) is 0L8C3.

The information contained in this publication is subject to change without
notice.

Trademarks

EXFO’s trademarks have been identified as such. However, the presence
or absence of such identification does not affect the legal status of any
trademark.

Units of Measurement

Units of measurement in this publication conform to SI standards and
practices.

Version number: 2.0.0

ii IQS-2400

Contents

Contents

Certification Information ........................................................................................................v

1 Introducing the IQS-2400 WDM Laser Source ............................................. 1

Main Features .........................................................................................................................1

Safety Features .......................................................................................................................4

Typical Applications ................................................................................................................6

Conventions ............................................................................................................................7

2 Safety Information ....................................................................................... 9

3 Getting Started with Your WDM Laser Source ......................................... 11

Inserting and Removing Test Modules ..................................................................................11

Starting the WDM Laser Source Application .........................................................................15

Entering Values Using Sliders and Numeric Boxes .................................................................19

Exiting the Application .........................................................................................................20

4 Setting Up the WDM Laser Source ............................................................ 21

Selecting a Control Mode .....................................................................................................21

Setting Modulation (for Dither and On/Off Modulation) ......................................................24

Configuring Wavelength/Frequency or Delta Temperature ....................................................26

Configuring Power or Delta Current .....................................................................................30

Managing Fine-Tuning Values ...............................................................................................33

Managing Predefined Parameters (Presets) ...........................................................................34

Saving and Recalling Configurations .....................................................................................37

5 Operating the WDM Laser Source ............................................................. 39

Cleaning and Connecting Optical Fibers ...............................................................................39

Installing the EXFO Universal Interface (EUI) .........................................................................40

Activating and Deactivating the Source ................................................................................41

Correcting the Output Power Level .......................................................................................43

Synchronizing Sources ..........................................................................................................45

6 Controlling Multiple WDM Laser Source Modules ................................... 47

Starting a Multimodule Application ......................................................................................47

Selecting Modules to Control ...............................................................................................48

Setting Up Multiple IQS-2400 WDM Laser Source Modules ..................................................49

Controlling a Single IQS-2400 WDM Laser Source ................................................................53

Navigating and Closing Multiple Module Windows ..............................................................54

WDM Laser Source iii

Contents

7 Monitoring WDM Laser Source Modules ...................................................55

Using Monitor Windows .......................................................................................................55

Using QuickTools ...................................................................................................................58

8 Maintenance ................................................................................................61

Cleaning Fixed Connectors ....................................................................................................62

Cleaning EUI Connectors ......................................................................................................64

Recalibrating the Unit ...........................................................................................................66

Recycling and Disposal (Applies to European Union Only) ....................................................67

9 Troubleshooting ..........................................................................................69

Solving Common Problems ...................................................................................................69

Viewing Online Documentation ............................................................................................70

Finding Information on the EXFO Web Site ..........................................................................70

Contacting the Technical Support Group ..............................................................................71

Transportation ......................................................................................................................72

10 Warranty ......................................................................................................73

General Information .............................................................................................................73

Liability .................................................................................................................................73

Exclusions .............................................................................................................................74

Certification ..........................................................................................................................74

Service and Repairs ...............................................................................................................75

EXFO Service Centers Worldwide ..........................................................................................76

A Technical Specifications ..............................................................................77

B SCPI Command Reference ..........................................................................79

Quick Reference Command Tree ...........................................................................................80

Product-Specific Commands—Description ............................................................................83

C Polarization-Maintaining Laser Connectorization ..................................181

D Wavelength and Power Control, General Principles ...............................183

Wavelength Control ............................................................................................................183

Power Control .....................................................................................................................183

Index ...............................................................................................................185

iv IQS-2400

Certification Information

Certification Information

F.C.C. Information

Electronic test equipment is exempt from Part 15 compliance (FCC) in
the United States. However, compliance verification tests are
systematically performed on most EXFO equipment.

 Information

Electronic test equipment is subject to the EMC Directive in the European
Union. The EN61326 standard prescribes both emission and immunity
requirements for laboratory, measurement, and control equipment.
This unit has undergone extensive testing according to the European Union
Directive and Standards.

IMPORTANT

Use of shielded remote I/O cables, with properly grounded shields
and metal connectors, is recommended in order to reduce radio
frequency interference that may emanate from these cables.

WDM Laser Source v

Certification Information

Application of Council Directive(s): 73/23/EEC - The Low Voltage Directive

89/336/EEC - The EMC Directive

And their amendments
Manufacturer’s Name: EXFO Electro-Optical Engineering Inc.
Manufacturer’s Address: 400 Godin Avenue

Quebec, Quebec

Canada G1M 2K2

[phone]
Equipment Type/Environment: Test & Measurement / Industrial
Trade Name/Model No.: IQS-2400

WDM Laser Source

Standard(s) to which Conformity is Declared:

EN 61010-1:2001 Safety Requirements for Electrical Equipment for Measurement,

Control, and Laboratory Use, Part 1: General Requirements.

EN 60825-1:1994 +A11:1996
+A2: 2001 +A1: 2002

Safety of laser products – Part 1: Equipment classifications,
requirements, and user’s guide

EN 55022: 1998 +A2: 2003 Limits and Methods of Measurement of Radio Disturbance

Characteristics of Information Technology Equipment.

EN 61326:1997 +A1:1998
+A2:2001 + A3:2003

Electrical Equipment for Measurement, Control and Laboratory
Use - EMC Requirements

I, the undersigned, hereby declare that the equipment specified above conforms to the above Directive and Standards.

Manufacturer

Signature:

Full Name: Stephen Bull, E. Eng
Position: Vice-President Research and

Development

Address:

400 Godin Avenue, Quebec (Quebec),
Canada, G1M 2K2

Date: January 7, 2002

DECLARATION OF CONFORMITY

vi IQS-2400

1 Introducing the IQS-2400

WDM Laser Source

Main Features

The IQS-2400 WDM Laser Source is a DFB laser source configured at a
wavelength set at the time of purchase. However, you can adjust this
wavelength within a ± 1 nm tuning range around the ITU-T wavelengths.
This DFB laser source integrates an internal attenuation so you can vary the
output power. The built-in optical isolator of the DFB laser increases power
stability. All models, except the IQS-2402, can also come equipped with a
built-in polarization-maintaining fiber (PMF) output.

The power and wavelength of each DFB laser are calibrated using a
wavelength meter and a four-channel power meter traceable to NIST
standards (for power) or to natural physical constants (for wavelengths).
This calibration method ensures a fully referenced and automated
calibration of the DFB’s internal temperature and laser current to obtain a
precise central wavelength at any power level.

WDM Laser Source 1

Introducing the IQS-2400 WDM Laser Source

Sync. in TTL port

Sync. out TTL port

Source port

Interlock connector

Laser radiation hazard sticker
(certain models only)

SYNC.
OUT
TTL

SYNC.
IN
TTL

ACTIVE

OUT

WDM Laser Source

IQS-2400

Retaining screw knob

Active LED

LED push button

Main Features

The IQS-2400 WDM Laser Source features wavelength tuning capabilities
for each of the ITU-T grid wavelengths, coherence control through a small
signal, and direct current modulation with a triangular or square
waveform. DFB laser diode manufacturers can also choose to integrate
their own lasers into the IQS-2400 WDM Laser Source.

Note: Actual connectors may differ from the ones shown above.

2 IQS-2400

Introducing the IQS-2400 WDM Laser Source

Main Features

The IQS-2400 WDM Laser Source can operate in the following modes:

³ Normal mode provides access to total wavelength- and power-tuning

ranges, maintaining full control of the output power (automatic power
control).

³ High Wavelength Stability mode enables you to set wavelength and

power-tuning resolution with picometer accuracy through laser
temperature and current steps.

³ Dither Modulation mode adds a small waveform (triangular or square)

to the central wavelength signal, reducing the signal coherence length.
It provides modulation capabilities.

³ On/Off Modulation mode ensures maximum optical extinction and

make possible the synchronization of several sources from an external
TTL signal generator or from any module synchronization output. It
provides modulation capabilities.

WDM Laser Source 3

Introducing the IQS-2400 WDM Laser Source

Safety Features

Safety Features

To comply with laser safety regulations, each IQS-2400 WDM Laser Source
is supplied with special security features.

Interlock Connector

The IQS-2400 WDM Laser Source is equipped with a remote interlock
connector so you can install a security switch or panic button. The WDM
Laser Source is shipped with an internally shorted interlock cap. It is your
responsibility to install external remote interlocks to ensure safe use of
your instrument.

The sticker is affixed to the front panel, just above the
interlock connector to identify it.

The interlock circuit has the following characteristics:

³ When it is open, the WDM Laser Source cannot be activated.

³ If the WDM Laser Source is active before the interlock circuit is

opened, it becomes inactive. For your safety, the WDM Laser Source
will not become active automatically upon closing the interlock circuit.
You will have to turn it on again. Putting the application’s switch to OFF
will shut down the instrument at any time.

The state of the interlock circuit (open or closed) is indicated in the WDM
Laser Source application.

4 IQS-2400

Introducing the IQS-2400 WDM Laser Source

Instrument is unlocked:
Closed interlock icon

Instrument is locked:

Open interlock icon

Safety Features

Protection Software Key

For additional safety, you cannot activate the WDM Laser Source (with the
application ON/OFF switch) without unlocking it by entering the security
password “safekey”when prompted.

Note: This password cannot be changed and is the same for all instruments

requiring a software key.

Once the instrument has been unlocked, the Unlock button remains
pressed and the icon shows a closed interlock.

Five-Second Safety Delay

The IQS-2400 WDM Laser Source application provides a five-second safety
delay between the instrument activation and actual light emission. During
this five-second delay, you may cancel the activation of the laser by using
the instrument activation/deactivation switch, by opening the interlock
circuit or by using the software key button.

Note: The source emits a weak signal during the five-second delay.

WDM Laser Source 5

Introducing the IQS-2400 WDM Laser Source

Typic a l A pp l icatio n s

Typical Applications

Because of its accuracy, you can use the IQS-2400 WDM Laser Source
instead of a wavelength measurement system when testing components
and subsystems.

The IQS-2400 WDM Laser Source emulates ITU-T channels in dense WDM
applications such as multiwavelength network simulation, simultaneous
multiple inputs for EDFA characterization, and insertion loss measurement
of WDM passive components. It is ideal for production environments and
offers unequaled long-term wavelength stability.

Place more than one IQS-2400 WDM Laser Source in an IQS Platforms and
obtain the versatility and reliability you need for optical fiber amplifier
testing and network qualification. In addition, with the IQS Platforms, you
can set up and control all of your modules at the same time.

You can customize your own high-performance test station by adding one
or several of the following modules to the WDM Laser Source: IQS-3100
Variable Attenuator, IQS-5100B Polarization Scrambler, IQS-5250B Optical
Spectrum Analyzer, IQS-9100 Optical Switch.

The IQS-2400 WDM Laser Source supports local control (via the
IQS Manager software) and remote control (through GPIB, RS-232, or
Ethernet TCP/IP using SCPI commands or the provided LabVIEW drivers).
For more information, refer to the IQS platform user guide.

6 IQS-2400

Introducing the IQS-2400 WDM Laser Source

Conventions

Conventions

Before using the product described in this manual, you should understand
the following conventions:

WARNING

Indicates a potentially hazardous situation which, if not avoided,
could result in death or serious injury. Do not proceed unless you
understand and meet the required conditions.

CAUTION

Indicates a potentially hazardous situation which, if not avoided,
may result in minor or moderate injury. Do not proceed unless you
understand and meet the required conditions.

CAUTION

Indicates a potentially hazardous situation which, if not avoided,
may result in component damage. Do not proceed unless you
understand and meet the required conditions.

IMPORTANT

Refers to information about this product you should not overlook.

WDM Laser Source 7

2 Safety Information

Affixed to module’s
side panel

Affixed to module’s
side panel

WARNING

Do not install or terminate fibers while a light source is active.
Never look directly into a live fiber and ensure that your eyes are
protected at all times.

WARNING

Use of controls, adjustments and procedures for operation and
maintenance other than those specified herein may result in
hazardous radiation exposure.

Your instrument is a Class 1M laser product in compliance with standards
IEC 60825-1 Amendment 2: 2001 and 21 CFR 1040.10. Invisible laser
radiation may be encountered at the output port.

The product is safe under reasonably foreseeable conditions of operation
but it may be hazardous if you use optics within a diverging or collimated
beam. Do not view directly with optical instruments.

WDM Laser Source 9

3 Getting Started with Your

Retaining screw

knob

Protective cover

2b

2a

WDM Laser Source

Inserting and Removing Test Modules

CAUTION

Never insert or remove a module while the controller unit and its
expansion units are turned on. This will result in immediate and
irreparable damage to both the module and unit.

To insert a module into the controller or expansion unit:

1. Exit IQS Manager and turn off all your units.

2. Remove the protective cover from the desired unused module slot.

2a. Pull the retaining screw knob firmly towards you and release the

bottom of the cover.

2b. Gently pull the top of the protective cover downwards, to remove

it from the unit grooves.

3. Position the module so that its front panel is facing you and the top and
bottom protruding edges are to your right.

WDM Laser Source 11

Getting Started with Your WDM Laser Source

Retaining screw

Retaining screw knob

Protruding edges
(right side of module)

5

6

Inserting and Removing Test Modules

4. Insert the protruding edges of the module into the grooves of the unit’s
module slot.

5. Push the module all the way to the back of the slot, until the retaining
screw makes contact with the unit casing.

6. While applying slight pressure to the module, turn the retaining screw
knob (located at the bottom of the panel) clockwise until the knob is
horizontal.

This will secure the module into its “seated” position.

12 IQS-2400

Getting Started with Your WDM Laser Source

Retaining screw knob

Inserting and Removing Test Modules

The module is correctly inserted when its front panel is flush with the front
panel of the controller or expansion unit.

When you turn on the controller unit, the startup sequence will
automatically detect your module.

Note: You can insert IQ modules into your controller or expansion unit; the

IQS Manager software will recognize them. However, the IQS-2400 locking
mechanism (retaining screw) will not work for IQ modules.

To remove a module from your controller or expansion unit:

1. While pulling gently on the knob, turn it counterclockwise until it stops.

The module will slowly be released from the slot.

2. Place your fingers underneath the module or hold it by the retaining
screw knob (NOT by the connector) and pull it out.

WDM Laser Source 13

Getting Started with Your WDM Laser Source

YES

NO

Retaining screw

knob

Connector

Inserting and Removing Test Modules

CAUTION

Pulling out a module by a connector could seriously damage both
the module and connector. Always pull out a module by the
retaining screw knob.

3. Cover empty slots with the supplied protective covers.

3a. Slide the top of the protective cover into the upper grooves of the

unit.

3b. Snap the cover into place by pushing the retaining screw knob.

Failure to reinstall protective covers over empty slots will result in
ventilation problems.

14 IQS-2400

CAUTION

Getting Started with Your WDM Laser Source

Highlighted

module

(white

background)

Starting the WDM Laser Source Application

Starting the WDM Laser Source Application

Your IQS-2400 WDM Laser Source module can be configured and
controlled from its dedicated IQS Managerapplication.

Note: For details about IQS Manager, refer to the IQS platform user guide.

To start the application:

1. From the Current Modules function tab select the module to use.

It will turn white to indicate that it is highlighted.

2. Click Start Application.

OR

Press the green LED push button on the front of the corresponding
module.

You can also double-click its row.

WDM Laser Source 15

Getting Started with Your WDM Laser Source

Function
tabs

Parameter

definition

controls

Data

display

Title bar

Status
bar

Starting the WDM Laser Source Application

Note: Pressing the LED push button will not activate or turn on the module.

Note: To start the corresponding monitor window at the same time, click Start

App. & Monitor. The window opens on the Monitors function tab.

The main window (shown below) contains all the commands required to
control the WDM Laser Source:

16 IQS-2400

Getting Started with Your WDM Laser Source

Source

control

mode

Source

status

indicator

Interlock circuit status indicator

Spectral and power values

Reference

values

Temperature and

current values

Open interlock circuit Closed interlock circuit

Starting the WDM Laser Source Application

Data Display

Depending on the setup, the displayed units (nm/THz, dBm/mW) will
change and some items may appear in bright colors or be grayed out.

The state of the interlock circuit (open or closed) is indicated by an icon, as
shown below:

WDM Laser Source 17

Getting Started with Your WDM Laser Source

Slot number in which module is inserted
(0 identifies first slot)

Controller unit or expansion unit (1 to 999) housing
the module

[ 999 – 1 ]

Current date and timeModule/unit status

Local: Module controlled locally only.

Remote: Module controlled remotely, but

local commands can also be used.

Lockout: Module controlled remotely only.

Control mode

Starting the WDM Laser Source Application

Title Bar

The title bar is located at the top of the main window. It displays the
module name and its position in the controller or expansion unit. The
module position is identified as follows:

Status Bar

The status bar, located at the bottom of the main window, identifies the
operational status of the IQS-2400 WDM Laser Source.

For more information about automating or remotely controlling the
IQS-2400 WDM Laser Source, refer to your platform user guide.

18 IQS-2400

Getting Started with Your WDM Laser Source

Numeric box
button

Fine-tuning

box

Slider

Navigation buttons

Parameter identification

Toggle button

Backspace button
(to correct a value)

Clear button

Entry display

Entering Values Using Sliders and Numeric Boxes

Entering Values Using Sliders and Numeric
Boxes

Many parameters in IQS Manager and module applications can be set
using the following tools.

³ Slider: Drag it to the desired value on the scale below.

³ Navigation buttons: Click either buttons to move the slider. The slider

moves by steps corresponding to the number in the fine-tuning box,
which you can change by using the up and down arrow buttons next to
the box. You cannot change the list of fine-tuning values from here.

³ Numeric box: Click it to display the on-screen numeric pad, which you

can use to enter a powe value.

WDM Laser Source 19

To enter a value using the numeric box:

1. Use the button to clear the entry display.

2. Enter the value.

3. Click OK to confirm the value.

Getting Started with Your WDM Laser Source

Exiting the Application

Exiting the Application

Closing any application that is not currently being used is a good way to
free system memory.

To close the application from the main window:

Click in the top right corner of the main window.

OR

Click the Exit button located at the bottom of the function bar.

To close all currently running applications:

From IQS Manager, click Close All Applications.

20 IQS-2400

4 Setting Up the WDM Laser

Source

Selecting a Control Mode

The IQS-2400 WDM Laser Source offers the following control modes:

Mode Explanation Display

Normal ³ To maximize output power

stability.

³ Default mode used to tune

wavelength and power
throughout their respective
ranges (2 nm for wavelength
and 10 dB for power).

³ To maintain power at the

specified level, the monitor
current at the back end of the
laser will be held constant.
Laser current intensity is
adjusted in real time to
produce a constant output
power. Since peak wavelength
varies with laser current
intensity, the emission
spectrum is slightly enlarged.

Dither
Modulation

³ Combination of Normal mode

and dithering.

³ In this mode, you can have a

1 mA to 5 mA tone (dithering),
which can either be a square
or triangular wave.

During laser stabilization,
spectral value (wavelength
or frequency) and power are
displayed in dark green;
however, adjustments can
be made by using the
control center buttons. After
laser temperature
stabilization, both values are
displayed in light green.

For Norm a l m od e o nl y : if
you use Relative value,
reference values appear at
the bottom right-hand side
of the display (see

Configuring
Wavelength/Frequency or
Delta Temperature on page
29 and Configuring Power or
Delta Current on page 33).

WDM Laser Source 21

Setting Up the WDM Laser Source

Selecting a Control Mode

Mode Explanation Display

High
Wa v el e ng t h
Stability

On/Off
Modulation

³ Used when central wavelength

stability is critical.

³ Current is constant, thus

maintaining wavelength
stability. Once power and
wavelength have been set to
the required levels (in Normal
mode), select High Wavelength
Stability mode to enhance
wavelength stability at the
established value. A limited
tuning range is permitted
around this value (± 1 °C for
wavelength or ± 1 mA for
current). Power stability can be
enhanced after a very long
stabilization period (typically 2
days).

³ This mode (50 % duty cycle)

uses half the average power
available from the source
module. It controls current
during the “on” cycle of the
signal.

³ The tuning range for

temperature and current are
the same as in High
Wavelength Stability mode.

Even though wavelength
and power are displayed in
light green, they cannot be
adjusted. Both modes are
used for fine-tuning laser
temperature and current on
a limited range around
nominal wavelength and
power levels reached in
Normal mode. Laser
temperature and current are
displayed just below the
power value.

22 IQS-2400

Setting Up the WDM Laser Source

Source

control

mode

Source

status

indicator

Interlock circuit status indicator

Spectral and power values

Reference valuesTemperature and current values

Selecting a Control Mode

The spectral value shown on the data display is either the wavelength or
the frequency of the signal emitted. The spectral value corresponds to the
spectral unit you select in the main window. Wavelength values are given
in nm and frequency values in THz.

To select a control mode:

1. From the main window, select the Settings function tab.

2. Select the Control and Modulation tab.

3. From the Control Mode panel, select the desired control mode.

Note: You can modify the control mode while the laser is active. Changes to laser

operation will take effect immediately.

WDM Laser Source 23

Setting Up the WDM Laser Source

Setting Modulation (for Dither and On/Off Modulation)

Setting Modulation (for Dither and On/Off
Modulation)

Modulation can be synchronized with a TTL signal coming from the
module itself (internal) or from another module (external). Default values
are Internal for synchronization and On/Off for modulation.

The module determines minimum and maximum frequencies.

For a dither modulation signal, you can select the depth and waveform of
the amplitude modulation signal added or overlapped over the CW signal.
The module's differential efficiency determines minimum and maximum
depths.

To set up the modulation:

1. From the main window, select the Settings function tab.

2. Select the Control and Modulation tab.

3. For the On/Off control mode, select the source synchronization mode:

internal or external from the Synchronization section.

Note: Synchronization can only be internal with Dither Modulation control mode.

24 IQS-2400

Setting Up the WDM Laser Source

Current
frequency

Fine-tuning values

Setting Modulation (for Dither and On/Off Modulation)

4. From the Frequency section, if you have selected internal
synchronization, you can adjust the modulation frequency of the laser
signal emitted by the source. For information on how to use the
controls, see Entering Values Using Sliders and Numeric Boxes on
page 19.

Note: You cannot edit fine-tuning values or add new values.

5. If you have selected the Dither Modulation control mode, you can

configure depth and waveform of the modulation signal as follows:

5a. Select the desired waveform (square or triangular) from the

Waveform panel.

5b. Specify the desired modulation signal depth with the Depth

controls.

Note: You cannot edit fine-tuning values or add new values.

WDM Laser Source 25

Setting Up the WDM Laser Source

Configuring Wavelength/Frequency or Delta Temperature

Configuring Wavelength/Frequency or Delta
Temperature

Values appearing on the display correspond to:

³ the actual value obtained in Normal or Dither Modulation modes at

selected wavelength

OR

³ the delta temperature (difference between the above value and the

temperature obtained after switching to High Wavelength Stability or
On/Off Modulation modes).

Adjustable parameters depend on the control mode:

³ Normal and Dither modes: to adjust the spectral value (wavelength or

frequency). Relative value is only available for these modes.

³ High Wavelength Stability and On/Off Modulation modes: once you

have set the wavelength in Normal mode or Dither, you can use these
modes to enhance wavelength stability at the established value
(permitted tuning range: ±1 °C).

³ In all modes, modifying the wavelength or frequency also modifies the

internal laser temperature. The source will then take a few seconds to
adjust to the new value.

26 IQS-2400

Setting Up the WDM Laser Source

Spectral and power values

Temperature and current values

(only displayed in High Wavelength Stability

and On/Off Modulation modes)

Stabilization

message

Wavelength/

frequency

selection

Presets list

Relative/absolute value selection

Configuring Wavelength/Frequency or Delta Temperature

The main window data display differs for each control mode.

To configure wavelength/frequency in (Normal or Dither
Modulation modes only):

1. If you want to display the source wavelength, select nm. If you want to

display the frequency, select THz.

WDM Laser Source 27

Setting Up the WDM Laser Source

Configuring Wavelength/Frequency or Delta Temperature

2. Select between Relative and Absolute values.

Selecting the relative value will make the current wavelength or
frequency the reference value. The new value shown on the data
display corresponds to the difference between the reference value and
the actual value.

3. Set the wavelength/frequency using one of the following methods:

³ Slider or navigation buttons

³ Up/down arrows to select the predefined parameters from the

Presets list and to confirm the selection. For more information,
see Managing Predefined Parameters (Presets) on page 34.

The source takes a few seconds to adjust to the selected values; a message
will be displayed on the left, just above the current source mode.

28 IQS-2400

Setting Up the WDM Laser Source

Presets list

Delta temperature control

Configuring Wavelength/Frequency or Delta Temperature

To configure the delta temperature (wavelength) in High
Wavelength Stability or On/Off Modulation modes:

Set the delta temperature using one of the following methods:

³ Slider or navigation buttons

³ Up/down arrows to select the predefined parameters from the Presets

list and to confirm the selection. For more information, see
Managing Predefined Parameters (Presets) on page 34.

The source takes a few seconds to adjust to the selected values, a message
will be displayed on the left, just above the current source mode.

WDM Laser Source 29

Setting Up the WDM Laser Source

Configuring Power or Delta Current

Configuring Power or Delta Current

Values appearing on the display correspond to:

³ the actual value on the source port obtained in Normal and Dither

Modulation modes at selected wavelength

OR

³ the delta obtained after switching to High Wavelength Stability and

On/Off modes).

Adjustable parameters depend on the control mode:

³ Normal and Dither modes: to adjust the source power. Relative value is

only available for these modes.

³ High Wavelength Stability and On/Off Modulation modes: once you

have set the desired power in Normal mode, you can use these modes
to enhance wavelength stability at the established value (permitted
tuning range: ±1 mA for temperature/wavelength).

³ In all modes, modifying the power current also modifies the internal

laser temperature. The source then takes a few seconds to adjust to
the new value and a message will be displayed.

The main window data display differs for each control mode.

30 IQS-2400

Setting Up the WDM Laser Source

Power unit Relative/absolute

value selection

Power panel control

Presets list

Configuring Power or Delta Current

To configure the source power in Normal or Dither Modulation
mode:

1. Select dBm or mW to modify the power units used in the data display.

2. Select between Relative and Absolute values. Selecting Relative value

will make the current power the reference value. The new value
shown corresponds to the difference between the reference value and
the actual value. For more information, see Configuring Power or Delta
Current on page 30.

3. Set the power using one of the following methods:

³ Slider or navigation buttons

³ Up/down arrows to select the predefined parameters from the

Presets list and to confirm the selection. For more information,
see Managing Predefined Parameters (Presets) on page 34.

The source will take a few seconds to adjust to the selected values, a
message will be displayed on the left, just above the current source mode.

WDM Laser Source 31

Setting Up the WDM Laser Source

Delta current

control

Presets list

Configuring Power or Delta Current

To configure the source delta current in High Wavelength
Stability or On/Off Modulation mode:

Set the delta current using one of the following methods:

³ Slider or navigation buttons

³ Up/down arrows to select the predefined parameters from the

Presets list and to confirm the selection. For more information,
see Managing Predefined Parameters (Presets) on page 34.

The source takes a few seconds to adjust to the selected values, a message
will be displayed on the left, just above the current source mode.

32 IQS-2400

Setting Up the WDM Laser Source

Entry box

Delete button

Apply button

Managing Fine-Tuning Values

Managing Fine-Tuning Values

Fine-tuning values are the increments (steps) used in Normal and Dither
Modulation modes to increase or decrease (with the navigation buttons or
slider):

³ signal wavelength or frequency in nm or THz.

³ power emitted by the source in dB or mW (Values are not converted

from one unit to the other).

Values can appear differently depending on the unit you select.

Note: Fine-tuning values are not available in High Wavelength Stability or in

On/Off Modulation modes since settings are made on delta temperature.

To add a new increment value:

1. Select the Settings function tab.

2. In the New Value box, enter the desired value.

3. Use to transfer the new value to the list.

To delete a value from the list:

1. Select the item to delete.

2. Use to remove the value from the list.

WDM Laser Source 33

Setting Up the WDM Laser Source

Managing Predefined Parameters (Presets)

Managing Predefined Parameters (Presets)

A preset is a set of parameters that you can use to configure the source in a
single operation. Presets are especially useful when you often need to set
the source to specific parameters.

Note: In Dither Modulation or On/Off Modulation modes, the application will not

retain any modulation information. Saved parameters are only related to
wavelength and power (actual values or delta temperature/current).

Control mode Parameters defined by presets

Normal

Dither
Modulation

High
Wa v el e ng t h
Stability

On/Off
Modulation

Presets list contains default values (defined by EXFO and calibrated at the
wavelength specified at time of purchase) and user-defined values. Each
preset is saved under a specific name. Presets appear on a list in the main
window.

You can remove or rename any preset from the list, except the default
ones.

³ power

³ minimum, central and maximum wavelength

³ power

³ central wavelength

³ relative laser temperature (difference between absolute

temperature and actual value)

³ relative drive current (difference between absolute

current and actual value)

IMPORTANT

To create a preset, the laser must be on and stabilized.

34 IQS-2400

Setting Up the WDM Laser Source

Apply button

Delete button

Managing Predefined Parameters (Presets)

To create a preset:

1. Select a control mode, as explained in Selecting a Control Mode on

page 21.

2. Adjust source wavelength and power to the desired levels.

For more information, see Configuring Wavelength/Frequency or Delta
Tem pe ra tu re on page 26 and Configuring Power or Delta Current on
page 30.

3. Select the Presets and Settings tab from the Settings function tab.

4. Use the Add Current Settings button to transfer the current source

settings to a new preset.

5. Enter a name for the preset (max. 10 characters) and add it to the list
with . You can also discard the new preset with .

6. The new set of values becomes the active preset and is displayed in
the main window.

Note: You should select a significant name to facilitate further usage of the preset.

For example, identify the new preset by its wavelength (for
example,1552.23) or give it the name of the signal destination (for
example,Channel_1).

WDM Laser Source 35

Setting Up the WDM Laser Source

Managing Predefined Parameters (Presets)

To rename a preset:

1. Select the Presets and Settings tab from the Settings function tab.

2. Select the preset to be renamed and use the Rename Preset button to

edit the name.

3. Enter the new name.

4. Confirm the modification by using .

To delete a preset:

1. Select the Presets and Settings tab from the Settings function tab.

2. Select the preset to remove.

3. Use the Remove From List button to delete the item.

36 IQS-2400

Setting Up the WDM Laser Source

To save parameters being used
just before shutting down,
overwriting the previous file.

To always use the last saved
parameters when starting.

Saving and Recalling Configurations

Saving and Recalling Configurations

Once you have set the IQS-2400 WDM Laser Source parameters, you can
save your custom configuration and recall it at any time. You can also recall
the factory-defined settings.

Saved configurations include all parameters set in the Control Center
(Instrument function tab) and in the Settings function tab (if present).

To save a configuration:

1. Select the Configuration function tab.

2. In the Current Module Configuration panel, enter the name you wish

to use for your configuration file.

It will be saved in
“D:\IQS Manager\Configuration Files\(your_module)\”.

3. Click Save.

WDM Laser Source 37

Setting Up the WDM Laser Source

Saving and Recalling Configurations

To recall a configuration:

1. Select the Configuration function tab.

2. Click Open.

3. Select the configuration file you wish to recall and confirm your action.

You are returned to the application and the new parameters are set.

To revert to factory settings:

1. Select the Configuration function tab.

2. Click the Reset Module to Factory Settings button.

Reverting to the factory settings will interrupt any module
operation in progress.

The operation may take a few seconds to complete.

IMPORTANT

IMPORTANT

38 IQS-2400

5 Operating the WDM Laser

Source

Cleaning and Connecting Optical Fibers

IMPORTANT

To ensure maximum power and to avoid erroneous readings:

³ Always clean fiber ends as explained below before inserting

them into the port. EXFO is not responsible for damage or
errors caused by bad fiber cleaning or handling.

³ Ensure that your patchcord has appropriate connectors. Joining

mismatched connectors will damage the ferrules.

To connect the fiber-optic cable to the port:

1. Clean the fiber ends as follows:

1a. Gently wipe the fiber end with a lint-free swab dipped in isopropyl

alcohol.

1b. Use compressed air to dry completely.

1c. Visually inspect the fiber end to ensure its cleanliness.

2. Carefully align the connector and port to prevent the fiber end from

touching the outside of the port or rubbing against other surfaces.

If your connector features a key, ensure that it is fully fitted into the
port’s corresponding notch.

3. Push the connector in so that the fiber-optic cable is firmly in place,
thus ensuring adequate contact.

If your connector features a screwsleeve, tighten the connector
enough to firmly maintain the fiber in place. Do not overtighten, as this
will damage the fiber and the port.

Note: If your fiber-optic cable is not properly aligned and/or connected, you will

notice heavy loss and reflection.

WDM Laser Source 39

Operating the WDM Laser Source

Bare metal

(or blue border)

indicates UPC

option

Green border
indicates APC

option

2 3 4

Installing the EXFO Universal Interface (EUI)

Installing the EXFO Universal Interface (EUI)

The EUI fixed baseplate is available for connectors with angled (APC) or
non-angled (UPC) polishing. A green border around the baseplate
indicates that it is for APC-type connectors.

To install an EUI connector adapter onto the EUI baseplate:

1. Hold the EU connector adapter so the dust cap opens downwards.

2. Close the dust cap in order to hold the connector adapter more firmly.

3. Insert the connector adapter into the baseplate.

4. While pushing firmly, turn the connector adapter clockwise on the

baseplate to lock it in place.

40 IQS-2400

Operating the WDM Laser Source

Indicates that

the WDM Laser

Source is locked

Activating and Deactivating the Source

Activating and Deactivating the Source

This section gives you all the information required to activate and
deactivate the source. For more information on the particular safety
features, see Safety Features on page 4.

IMPORTANT

To obtain optimum stability, warm up your laser source for 60
minutes once it has been activated.

To activate the WDM Laser Source:

1. Make sure that the interlock connector (located on the instrument

front panel) is closed.

Note: Since the interlock circuit is a mechanical device, it cannot be opened or

closed via the application.

2. If the WDM Laser Source is locked, you will have to unlock it with the
software key button (Unlock button). This button displays an open
interlock when the instrument is locked.

If necessary, use the Unlock button. When prompted, enter the
password “safekey”.

Note: Using the Unlock button when the instrument is unlocked will

automatically stop light emission.

WDM Laser Source 41

Operating the WDM Laser Source

Source

status

indicator

Interlock circuit status indicator

Activating and Deactivating the Source

3. From the Instrument function tab, set the Source switch to ON.

The status indicator flashes during the five-second safety delay. When
the source is active, the LED on the module front panel lights up and
the status indicator appears in bright red with two right-pointing
arrows.

To deactivate the WDM Laser Source:

³ Put the activation/deactivation switch to Off.

OR

³ Use the Unlock button. This ensures that you will need to enter a

password again when you reactivate the instrument.

Once the source has been deactivated, the LED on the module front panel
turns off, the status indicator appears in dark red and the arrows disappear.

42 IQS-2400

Operating the WDM Laser Source

Correcting the Output Power Level

Correcting the Output Power Level

Although the module is precisely calibrated, the actual output power level
may slightly drift over time due to connector usage and laser aging. When
this occurs, you can use the power calibration option to adjust the output
power level to its actual value, as measured using a calibrated power
meter.

Correcting the source output power level is only possible in Normal mode.
If you are controlling multiple IQS-2400 WDM Laser Source modules, you
will have to adjust each source output power level individually (use the
Control Single Instrument button to switch to the appropriate tab).

To correct the output power level:

1. Use a reference patchcord with a known insertion loss and make sure

it has been properly cleaned at both ends.

2. Connect the patchcord between a calibrated power meter and the
source port.

3. Make sure you activated the source at least one hour before correcting
the output power level. For more information, see Activating and
Deactivating the Source on page 41.

WDM Laser Source 43

Operating the WDM Laser Source

Apply button

Calibration

instructions

Correcting the Output Power Level

4. Select the Settings function tab, then select the presets and settings
tab.

5. From the Power Calibration panel, follow the instructions displayed.
Once you have entered the value, confirm with . The "User
Calibration" label will appear on the left side of the Instrument
function tab data display.

The new power level is used as a reference to reestablish the
correspondence between the output power level and the displayed
values.

Use the Factory Calibration button to return to EXFO’s original
calibration at any time. The "User Calibration" label will disappear from
the Instrument function tab display.

44 IQS-2400

Operating the WDM Laser Source

Synchronizing Sources

Synchronizing Sources

You can use synchronization to simultaneously perform operations
(for example, wavelength adjustments) on many IQS-2400 WDM Laser
Source modules. The sources can be synchronized with a signal coming
from an external instrument or from an other IQS-2400 WDM Laser Source.

To synchronize your source module with another instrument:

1. Connect a BNC cable from

³ the external device to the Sync. In TTL port of the first source

module.

OR

³ the Sync. Out port of the synchronizing IQS-2400 WDM Laser

Source to the Sync. In TTL port of the sources to be synchronized.

2. Use a BNC-T connector between each Sync. In port if more than one
source needs to be synchronized.

WDM Laser Source 45

6 Controlling Multiple WDM

Laser Source Modules

With your platform, you can set common parameters and simultaneously
operate several modules of the same kind in a single interface, which is
particularly useful in larger systems.

Note: You should be familiar with the configuration and operation of a single

module before controlling multiple modules simultaneously.

Starting a Multimodule Application

The multimodule applications available will change according to your
module configuration (model, type, etc.).

Note: When you start a multimodule application, you cannot open a monitor

window at the same time, as it is possible with a single-module
application. You must open the monitor window independently.

To start a multimodule application:

1. In IQS Manager, select the Integrated Applications function tab.

2. Click the appropriate Multiple Module Controller button.

The multimodule application appears in a new window.

Note: More than one Multiple Module Controller button may be displayed if

different models are present in your platform.

WDM Laser Source 47

Controlling Multiple WDM Laser Source Modules

Specific
module

selection

All

modules

selection

Selecting Modules to Control

Selecting Modules to Control

Before you can modify the module parameters, you must specify which
modules you intend to use.

To select IQS-2400 WDM Laser Source modules:

1. On the Modules/Config function tab, select the boxes corresponding

to the modules you want to control.

OR

Click Select All if you want to work with all IQS-2400 WDM Laser

48 IQS-2400

Source modules.

2. Click Apply Selections and click the Instruments function tab.

Controlling Multiple WDM Laser Source Modules

Parameter

definition

controls

Single
source mode

Selected

module

indicator

Master control indicator (open lock: on; closed

lock: off). See Protection Software Key on page 5.

Information appears in red during
source stabilization

Source

Status

Setting Up Multiple IQS-2400 WDM Laser Source Modules

Setting Up Multiple IQS-2400 WDM Laser
Source Modules

Principles that rule the performance of your IQS-2400 WDM Laser Source
are the same whether you control one or many sources at the same time.
For information, see Wavelength and Power Control, General Principles on
page 183.

All parameters that can be set for a single module can also be set for
multiple modules, except for preset values (because source characteristics
may vary from one module to another). In fact, all the settings must be

WDM Laser Source 49

made with offset values.

Controlling Multiple WDM Laser Source Modules

Apply button

Control
modes

Setting Up Multiple IQS-2400 WDM Laser Source Modules

IMPORTANT

Before setting parameters or turning sources on, make sure that
their corresponding boxes are selected.

To modify a particular parameter (all are set the same way):

1. Select the tab associated with the parameter to be modified.

2. Use the and buttons to define the value that will be added to the

parameter value. If you want to decrease the parameter value, make
sure that the offset is negative.

Note: You can modify the step used when you increase or decrease the offset

value. Use the Offset Step up/down arrows to modify the step.

3. When you are satisfied with the offset value, use to confirm the new
setting.

Note: If the new offset value is out of the permitted range, the application displays

an error message.

To set the control mode:

For information, see Selecting a Control Mode on page 21.

50 IQS-2400

Controlling Multiple WDM Laser Source Modules

Modulation parameter controls

Wavelength parameter controls

Setting Up Multiple IQS-2400 WDM Laser Source Modules

To set modulation:

For information, see Setting Modulation (for Dither and On/Off Modulation)
on page 24.

To set wavelength/frequency:

Wavelength or frequency will be used with Normal and Dither Modulation
modes. With the Quick Settings buttons, you can directly set the source
wavelength values to their intrinsic Maximum, Central or Minimum value.

For information, see Configuring Wavelength/Frequency or Delta
Tem pe ra tu re on page 26.

WDM Laser Source 51

Controlling Multiple WDM Laser Source Modules

Power parameter controls

Delta temperature parameter controls

Setting Up Multiple IQS-2400 WDM Laser Source Modules

To s et p ow er :

Power will be used with Normal and Dither Modulation modes. With the
Quick Settings buttons, you can directly set the source power value to their
intrinsic Maximum or Minimum value.

For information, see Configuring Power or Delta Current on page 30.

To set delta temperature:

Delta temperature will be used with High Wavelength Stability and On/Off
Modulation modes.

For information, see Configuring Wavelength/Frequency or Delta
Tem pe ra tu re on page 26.

52 IQS-2400

Controlling Multiple WDM Laser Source Modules

Delta current parameter controls

Controlling a Single IQS-2400 WDM Laser Source

To set delta current:

Delta current will be used with High Wavelength Stability and On/Off
Modulation modes.

For information, see Configuring Power or Delta Current on page 30.

Controlling a Single IQS-2400 WDM Laser
Source

You may want to control a specific module among all the IQS-2400 WDM
Laser Source modules that you have in the system.

To control a specific IQS-2400 WDM Laser Source:

1. Make sure that the row corresponding to the module you want to

control appears in bold or that it is highlighted.

2. Use the Control Single Instrument button to open the IQS-2400 WDM
Laser Source application.

WDM Laser Source 53

Controlling Multiple WDM Laser Source Modules

IQS Manager - Integrated
Applications (Multi-modules)

Your module main application
window (single module)

Your module Multiple Module
Controller - Instruments tab

Your module Multiple Module
Controller - Modules/Config tab

Open

Apply Selections

Control Single

Instrument

Exit

Exit

Navigating and Closing Multiple Module Windows

Navigating and Closing Multiple Module
Windows

When controlling multiple modules, a number of windows are open at the
same time. To close a window, use the Exit button located under the
function tabs. You will return to the preceding window.

The following diagram illustrates the navigation between windows:

54 IQS-2400

7 Monitoring WDM Laser Source

Modules

When using your IQS-2400 WDM Laser Source module, either alone or
with other modules in a test setup, you can view module data and status
using its monitor window in IQS Manager.

Using Monitor Windows

Monitor windows display basic data about modules. A combination of
resizable windows allows you to create an integrated data display (refer to
the platform user guide).

From the monitor window, you can change module parameters either by:

³ opening the module application to access all the functions

OR

³ using the QuickTools utility, which provides frequently used functions

from the application.

WDM Laser Source 55

Monitoring WDM Laser Source Modules

Selected modules

(checked)

Using Monitor Windows

To select modules and display their monitor windows:

1. On the Current Modules function tab, select the controller or

expansion unit containing the modules you want to monitor.

2. In the Monitor column, select the box next to each module you want
to monitor.

If you want to monitor all the modules in the current unit, click Select

All Monitors. If you want to clear your choices, click Deselect All
Monitors.

56 IQS-2400

Monitoring WDM Laser Source Modules

Close

button

Rearrange

Monitors

button

(1 or 2

columns)

Monitor window
arrow buttons

Close All
button

Using Monitor Windows

3. Click Start Monitor to apply your selection.

IQS Manager will display the selected monitor windows on the
Monitors function tab.

Note: To start t he highlighted module’s corresponding application at the same

time, click Start App. & Monitor. The application will appear in a different
window.

WDM Laser Source 57

Monitoring WDM Laser Source Modules

Using QuickTools

Using QuickTools

With QuickTools, you can fine-tune your module directly, while keeping an
eye on your entire test setup.

Note: You can only access QuickTools if the module’s monitor window is selected

from the Monitors function tab and is currently active.

To start QuickTools:

1. From the Monitors function tab, elect the monitor window of the

module you wish to control.

2. Using the arrow button in the upper left corner, select QuickTools.

The corresponding monitor window flashes when QuickTools is
activated.

Note: If you want to open the actual application for your module rather than

QuickTools, click Show Controller.

58 IQS-2400

Monitoring WDM Laser Source Modules

Using QuickTools

To control a specific source with QuickTools:

1. Ensure that the source monitor window is selected.

2. Select the appropriate control mode. For a full explanation on control

modes, see Selecting a Control Mode on page 21.

3. From the Wavelength section, adjust the wavelength as follows:

3a. If the control mode is Normal or Dither Modulation, select

between frequency (THz) and wavelength (nm).

3b. Adjust the value and confirm your settings.

4. From the Power section, adjust the power as follows:

4a. If the control mode is Normal or Dither Modulation, select the unit

in which you want the values to be expressed: mW or dBm.

4b. Adjust the value and confirm your settings.

5. Unlock the source and turn it on. For more information, see Activating

and Deactivating the Source on page 41.

Note: Preset values are not available from the QuickTools utility.

To c lo s e Q ui c kTo o l s :

³ Click the Close button located at the top of the window.

OR

³ Click outside the QuickTools window.

To close a monitor window:

Click the button on the upper left of the monitor window and select
Remove Monitor.

OR

Click the Close All button at the bottom of the window.

WDM Laser Source 59

8 Maintenance

To help ensure long, trouble-free operation:

³ Always clean fiber-optic connectors before using them.

³ Keep the unit free of dust.

³ Clean the unit casing and front panel with a cloth slightly dampened

with water.

³ Store unit at room temperature in a clean and dry area. Keep the unit

out of direct sunlight.

³ Avoid high humidity or significant temperature fluctuations.

³ Avoid unnecessary shocks and vibrations.

³ If any liquids are spilled on or into the unit, turn off the power

immediately and let the unit dry completely.

Use of controls, adjustments, and procedures for operation and
maintenance other than those specified herein may result in
hazardous radiation exposure.

WARNING

WDM Laser Source 61

Maintenance

Cleaning Fixed Connectors

Cleaning Fixed Connectors

Regular cleaning of connectors will help maintain optimum performance.
Do not try to disassemble the unit. Doing so would break the connector.

To clean fixed connectors:

1. Fold a lint-free wiping cloth in four to form a square.

2. Moisten the center of the lint-free wiping cloth with only one drop of

isopropyl alcohol.

Alcohol may leave traces if used abundantly. Avoid contact between
the tip of the bottle and the wiping cloth, and do not use bottles
that distribute too much alcohol at a time.

3. Gently wipe the connector threads three times with the folded and
moistened section of the wiping cloth.

IMPORTANT

IMPORTANT

Isopropyl alcohol takes approximately ten seconds to evaporate.
Since isopropyl alcohol is not absolutely pure, evaporation will
leave microscopic residue. Make sure you dry the surfaces before
evaporation occurs.

4. With a dry lint-free wiping cloth, gently wipe the same surfaces three
times with a rotating movement.

5. Throw out the wiping cloths after one use.

6. Moisten a cleaning tip (2.5 mm tip) with only one drop of isopropyl

alcohol.

62 IQS-2400

Maintenance

7

8

9

Cleaning Fixed Connectors

IMPORTANT

Alcohol may leave traces if used abundantly. Avoid contact between
the tip of the bottle and the cleaning tip, and do not use bottles
that distribute too much alcohol at a time.

7. Slowly insert the cleaning tip into the connector until it reaches the
ferrule inside (a slow clockwise rotating movement may help).

8. Gently turn the cleaning tip one full turn.

9. Continue to turn as you withdraw the cleaning tip.

10. Repeat steps 7 to 9, but this time with a dry cleaning tip (2.5 mm tip

provided by EXFO).

Note: Make sure you don’t touch the soft end of the cleaning tip and verify the

cleanliness of the cotton tip.

11. Throw out the cleaning tips after one use.

WDM Laser Source 63

Maintenance

Push

Tur n

Pull

3

4

5

Cleaning EUI Connectors

Cleaning EUI Connectors

Regular cleaning of EUI connectors will help maintain optimum
performance. There is no need to disassemble the unit.

If any damage occurs to internal connectors, the module casing will
have to be opened and a new calibration will be required.

To clean EUI connectors:

1. Remove the EUI from the instrument to expose the connector

baseplate and ferrule.

IMPORTANT

2. Moisten a 2.5 mm cleaning tip with one drop of isopropyl alcohol
(alcohol may leave traces if used abundantly).

3. Slowly insert the cleaning tip into the EUI adapter until it comes out on
the other side (a slow clockwise rotating movement may help).

4. Gently turn the cleaning tip one full turn, then continue to turn as you
withdraw it.

64 IQS-2400

Cleaning EUI Connectors

5. Repeat steps 3 to 4 with a dry cleaning tip.

Note: Make sure you don’t touch the soft end of the cleaning tip.

6. Clean the ferrule in the connector port as follows:

6a. Deposit one drop of isopropyl alcohol on a lint-free wiping cloth.

IMPORTANT

Isopropyl alcohol may leave residues if used abundantly or left to
evaporate (about 10 seconds).

Avoid contact between the tip of the bottle and the wiping cloth,
and dry the surface quickly.

6b. Gently wipe the connector and ferrule.

6c. With a dry lint-free wiping cloth, gently wipe the same surfaces to

ensure that the connector and ferrule are perfectly dry.

6d. Verify connector surface with a portable fiber-optic microscope

(for example, EXFO’s FOMS) or inspection probe (for
example, EXFO’s FIP).

Maintenance

WARNING

Verifying the surface of the connector WHILE THE UNIT IS ACTIVE
WILL result in permanent eye damage.

7. Put the EUI back onto the instrument (push and turn clockwise).

8. Throw out cleaning tips and wiping cloths after one use.

WDM Laser Source 65

Maintenance

Recalibrating the Unit

Recalibrating the Unit

Manufacturing and service center calibrations are based on the
ISO/IEC 17025 Standard, which states that calibration documents must not
contain a recommended calibration interval, unless this has been
previously agreed upon with the customer.

Validity of specifications depends on operating conditions. For example,
the calibration validity period can be longer or shorter depending on the
intensity of use, environmental conditions and unit maintenance. You
should determine the adequate calibration interval for your unit according
to your accuracy requirements.

Under normal use, EXFO recommends calibrating your unit every year.

66 IQS-2400

Maintenance

Recycling and Disposal (Applies to European Union Only)

Recycling and Disposal
(Applies to European Union Only)

Recycle or dispose of your product (including electric and
electronic accessories) properly, in accordance with local
regulations. Do not dispose of it in ordinary garbage receptacles.

This equipment was sold after August 13, 2005 (as identified by
the black rectangle).

³ Unless otherwise noted in a separate agreement between EXFO and a

customer, distributor or commercial partner, EXFO will cover costs
related to the collection, treatment, recovery and disposal of
end-of-lifecycle waste generated by electronic equipment introduced
after August 13, 2005 to an European Union member state with
legislation regarding Directive 2002/96/EC.

³ Except for reasons of safety or environmental benefit, equipment

manufactured by EXFO, under its brand name, is generally designed to
facilitate dismantling and reclamation.

For complete recycling/disposal procedures and contact information, visit
the EXFO Web site at www.exfo.com/recycle.

WDM Laser Source 67

9 Troubleshooting

Solving Common Problems

Problem Probable Cause Recommended Action

LED push button does not
illuminate.

Pushing the LED push
button does not open the
module main window.

Source appears unstable. Insufficient

Power not on. Check AC power cord and turn on

Module is not
properly inserted.

Computer is
locked up.

LED is burnt. Contact EXFO.

Computer is
locked up.

stabilization time.

Reflection
destabilizing the
source.

Ambient
temperature
varies.

the controller and expansion units.

Turn off the controller and expansion
units, remove and reinsert the
module.

Reboot the controller unit.

Reboot the controller unit.

Wait a minimum of 60 minutes for
optimum stabilization.

Connect the source using an optical
isolator.

Control ambient temperature.

WDM Laser Source 69

Troubleshooting

Viewing Online Documentation

Viewing Online Documentation

An online version of the IQS-2400 WDM Laser Source user guide is
conveniently available at all times from the application.

To access the online user guide:

Click Help in the function bar.

Finding Information on the EXFO Web Site

The EXFO Web site provides answers to frequently asked questions (FAQs)
regarding the use of your IQS-2400 WDM Laser Source.

To access FAQs:

1. Ty pe http://www.exfo.com in your Internet browser.

2. Click the Support tab.

3. Click FAQs and follow the on-screen instructions. You will be given a

list of questions pertaining to your subject.

The EXFO Web site also provides the product’s most recent technical
specifications.

70 IQS-2400

Troubleshooting

Ver.

Mfg.
date

P/N

S/N
Made in Canada QST442B

465 Godin Avenue
Vanier (Quebec) G1M 3G7 CANADA

**************** A

January 2020

542392-3D

IQS-24XXBLD-XX-XX-XX

Wavelength band

Power

Specified wavelength (nm)

Connector code

Contacting the Technical Support Group

Contacting the Technical Support Group

To obtain after-sales service or technical support for this product, contact
EXFO at one of the following numbers. The Technical Support Group is
available to take your calls from Monday to Friday, 8:00 a.m. to 7:00 p.m.
(Eastern Time in North America).

For detailed information about technical support, visit the EXFO Web site at

www.exfo.com.

Technical Support Group

400 Godin Avenue
Quebec (Quebec) G1M 2K2
CANADA

To accelerate the process, please have information such as the name and
the serial number (see the product identification label—an example is
shown below), as well as a description of your problem, close at hand.

1 866 683-0155 (USA and Canada)
Tel.: [phone]
Fax: [phone]

[e-mail]

WDM Laser Source 71

Troubleshooting

Transportation

Transportation

Maintain a temperature range within specifications when transporting the
unit. Transportation damage can occur from improper handling. The
following steps are recommended to minimize the possibility of damage:

³ Pack the unit in its original packing material when shipping.

³ Avoid high humidity or large temperature fluctuations.

³ Keep the unit out of direct sunlight.

³ Avoid unnecessary shocks and vibrations.

72 IQS-2400

10 Warranty

General Information

EXFO Electro-Optical Engineering Inc. (EXFO) warrants this equipment
against defects in material and workmanship for a period of two years from
the date of original shipment. EXFO also warrants that this equipment will
meet applicable specifications under normal use.

During the warranty period, EXFO will, at its discretion, repair, replace,
or issue credit for any defective product, as well as verify and adjust the
product free of charge should the equipment need to be repaired or if the
original calibration is erroneous. If the equipment is sent back for
verification of calibration during the warranty period and found to meet all
published specifications, EXFO will charge standard calibration fees.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES EXPRESSED,
IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. IN NO EVENT SHALL EXFO BE LIABLE FOR
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

Liability

EXFO shall not be liable for damages resulting from the use of the product,
nor shall be responsible for any failure in the performance of other items to
which the product is connected or the operation of any system of which
the product may be a part.

EXFO shall not be liable for damages resulting from improper usage or
unauthorized modification of the product, its accompanying accessories
and software.

WDM Laser Source 73

Warranty

Exclusions

Exclusions

EXFO reserves the right to make changes in the design or construction of
any of its products at any time without incurring obligation to make any
changes whatsoever on units purchased. Accessories, including but not
limited to fuses, pilot lamps, batteries and universal interfaces (EUI) used
with EXFO products are not covered by this warranty.

This warranty excludes failure resulting from: improper use or installation,
normal wear and tear, accident, abuse, neglect, fire, water, lightning or
other acts of nature, causes external to the product or other factors beyond
EXFO’s control.

Certification

EXFO certifies that this equipment met its published specifications at the
time of shipment from the factory.

74 IQS-2400

Warranty

Service and Repairs

Service and Repairs

EXFO commits to providing product service and repair for five years
following the date of purchase.

To send any equipment for service or repair:

1. Call one of EXFO’s authorized service centers (see EXFO Service

Centers Worldwide on page 76). Support personnel will determine if
the equipment requires service, repair, or calibration.

2. If equipment must be returned to EXFO or an authorized service
center, support personnel will issue a Return Merchandise
Authorization (RMA) number and provide an address for return.

3. If possible, back up your data before sending the unit for repair.

4. Pack the equipment in its original shipping material. Be sure to include

a statement or report fully detailing the defect and the conditions under
which it was observed.

5. Return the equipment, prepaid, to the address given to you by support
personnel. Be sure to write the RMA number on the shipping slip. EXFO

will refuse and return any package that does not bear an RMAnumber.

Note: A test setup fee will apply to any returned unit that, after test, is found to

meet the applicable specifications.

After repair, the equipment will be returned with a repair report. If the
equipment is not under warranty, you will be invoiced for the cost
appearing on this report. EXFO will pay return-to-customer shipping costs
for equipment under warranty. Shipping insurance is at your expense.

Routine recalibration is not included in any of the warranty plans. Since
calibrations/verifications are not covered by the basic or extended
warranties, you may elect to purchase FlexCare Calibration/Verification
Packages for a definite period of time. Contact an authorized service center
(see EXFO Service Centers Worldwide on page 76).

WDM Laser Source 75

Warranty

EXFO Service Centers Worldwide

EXFO Service Centers Worldwide

If your product requires servicing, contact your nearest authorized service
center.

EXFO Headquarters Service Center

400 Godin Avenue
Quebec (Quebec) G1M 2K2
CANADA

EXFO Europe Service Center

Omega Enterprise Park, Electron Way
Chandlers Ford, Hampshire S053 4SE
ENGLAND

EXFO China Service Center/
Beijing OSIC

Beijing New Century Hotel
Office Tower, Room 1754-1755
No. 6 Southern Capital Gym Road
Beijing 100044
P. R . C H I N A

1 866 683-0155 (USA and Canada)
Tel.: [phone]
Fax: [phone]

[e-mail]

Tel.: [phone]
Fax: [phone]

[e-mail]

Tel.: [phone]
Fax: [phone]

[e-mail]

76 IQS-2400

A Technical Specifications

SPECIFICATIONS

a

FTB-85102 FTB-8510-12 FTB-8510-2

Ports Gigabit Ethernet Two 10/100Base-T Two 10/100Base-T Two 10/100Base-T and two

and one Gigabit Ethernet
Connector types RJ-45 (ISO 8877) RJ-45 (ISO 8877) and LC R J-45 (ISO 8877) and LC
Connect speed (Mb/s) 10/100 10/100/1000 10/100/1000
Duplex mode Full/half-duplex Full/half-duplex Full/half-duplex

auto-negotiation auto-negotiation auto-negotiation
Maximum port capacity (Mb/s) 200 (bidirectional) 2000 (bidirectional) 2000 (bidirectional)
Ethernet testing RFC 2544 RFC 2544 RFC 2544

RFC 1242 RFC 1242 RFC 1242

IQS-2402 SPEC IFICATIONS

Model P4

Wavelength band (nm) 1308 ±5
Wavelength tuning range (nm) ±0.5 (typical)
Wavelength tuning resolution b(nm) 0.01
Wavelength accuracy

c, d

(nm) ±0.01

Wavelength stability

d, e

(nm) ±0.002
Output power f(dBm) 10
Output power attenuation range (dB) >6
Sidemode suppression g(dB) 30 (40 typical)
Output power uncertainty c(dB) ±0.3
Power stability

c, d

(dB) 15 min ±0.005 (Δ= 0.01)

8 h ±0.03 (Δ= 0.06)
Modulation frequency (internal or external sync.) (kHz) 0.010 to 300
Dithered modulation amplitude range h(mA) 1 to 5
Dithered modulation electrical waveform Square/triangular

SPECIFICATIONS

a

FTB-85102 FTB-8510-12 FTB-8510-2

Ports Gigabit Ethernet Two 10/100Base-T Two 10/100Base-T Two 10/100Base-T and two

and one Gigabit Ethernet
Connector types RJ-45 (ISO 8877) RJ-45 (ISO 8877) and LC R J-45 (ISO 8877) and LC
Connect speed (Mb/s) 10/100 10/100/1000 10/100/1000
Duplex mode Full/half-duplex Full/half-duplex Full/half-duplex

auto-negotiation auto-negotiation auto-negotiation
Maximum port capacity (Mb/s) 200 (bidirectional) 2000 (bidirectional) 2000 (bidirectional)
Ethernet testing RFC 2544 RFC 2544 RFC 2544

RFC 1242 RFC 1242 RFC 1242

IQS-2403 SPEC IFICATIONS

Model P4/P5 P6/ P7

Wavelength band C-band C-band

1528 nm to1565 nm 1528 nm to 1565 nm
Wavelength tuning range a(nm) ±1 ±1
Wavelength tuning resolution b(nm) 0.01 0.01
Wavelength accuracy

c, d

(nm) ±0.01 ±0.02

Wavelength stability

d, e

(nm) ±0.002 ±0.002
Output power f(dBm) 10 13
Output power attenuation range (dB) 10 10
Sidemode suppression g(dB) 30 (40 typical) 30 (40 typical)
Output power uncertainy g(dB) ±0.3 ±0.3
Power stability

c, d

(dB) 15 min ±0.005 (Δ= 0.01) ±0.005 (Δ= 0.01)

8 h ±0.03 (Δ= 0.06) ±0.03 (Δ= 0.06)
Modulation frequency (internal or external sync.) (kHz) 0.010 to 300 0.010 to 300
Dithered modulation amplitude range h(mA) 1 to 5 1 to 5
Dithered modulation electrical waveform Square/triangular Square/triangular

IMPORTANT

The following technical specifications can change without notice.
The information presented in this section is provided as a reference
only. To obtain this product’s most recent technical specifications,
visit the EXFO Web site at www.exfo.com.

WDM Laser Source 77

Technical Specifications

SPECIFICATIONS

a

FTB-85102 FTB-8510-12 FTB-8510-2

Ports Gigabit Ethernet Two 10/100Base-T Two 10/100Base-T Two 10/100Base-T and two

and one Gigabit Ethernet
Connector types RJ-45 (ISO 8877) RJ-45 (ISO 8877) and LC R J-45 (ISO 8877) and LC
Connect speed (Mb/s) 10/100 10/100/1000 10/100/1000
Duplex mode Full/half-duplex Full/half-duplex Full/half-duplex

auto-negotiation auto-negotiation auto-negotiation
Maximum port capacity (Mb/s) 200 (bidirectional) 2000 (bidirectional) 2000 (bidirectional)
Ethernet testing RFC 2544 RFC 2544 RFC 2544

RFC 1242 RFC 1242 RFC 1242

Size (H x W x D) 125 mm x 36 mm x 282 mm 4

15

/

16

in x 1

7

/

16

in x 11

1

/

8

in
Weight 0.580 kg 1.25 lb
Temperature

Operating 10 °C to 40 °C 50 °F to 104 °F
Storage —40 °C to 70 °C —40 °F to 158 °F

Relative humidity 0 to 95 % non-condensing

Instruments Drivers

LabVIEW™ drivers, SCPI commands and COM/ DCOM libraries

Remote Control

With IQS-500: GPIB (IEEE-488.1, IEEE-488.2) Ethernet and RS-232.

Standard Accessories

User guide, test report and Certificate of Compliance.

SPECIFICATIONS

a

FTB-85102 FTB-8510-12 FTB-8510-2

Ports Gigabit Ethernet Two 10/100Base-T Two 10/100Base-T Two 10/100Base-T and two

and one Gigabit Ethernet
Connector types RJ-45 (ISO 8877) RJ-45 (ISO 8877) and LC R J-45 (ISO 8877) and LC
Connect speed (Mb/s) 10/100 10/100/1000 10/100/1000
Duplex mode Full/half-duplex Full/half-duplex Full/half-duplex

auto-negotiation auto-negotiation auto-negotiation
Maximum port capacity (Mb/s) 200 (bidirectional) 2000 (bidirectional) 2000 (bidirectional)
Ethernet testing RFC 2544 RFC 2544 RFC 2544

RFC 1242 RFC 1242 RFC 1242

IQS-2404 SPECIFICATIONS

Model P4/P5 P6/P7

Wavelength band L-band L-band

1566 nm to 1606 nm 1566 nm to 1606 nm
Wavelength tuning range a(nm) ±1 ±1
Wavelength tuning resolution b(nm) 0.01 0.01
Wavelength accuracy

c, d

(nm) ±0.01 ±0.02

Wavelength stability

d, e

(nm) ±0.002 ±0.002
Output power f(dBm) 10 13
Output power attenuation range (dB) 10 10
Sidemode suppression g(dB) 30 (40 typical) 30 (40 typical)
Output power uncertainty c(dB) ±0.3 ±0.3
Power stability

c, d

(dB) 15 min ±0.005 (Δ= 0.01) ±0.005 (Δ= 0.01)

8 h ±0.03 (Δ= 0.06) ±0.03 (Δ= 0.06)
Modulation frequency (internal or external sync.) (kHz) 0.010 to 300 0.010 to 300
Dithered modulation amplitude range h(mA) 1 to 5 1 to 5
Dithered modulation electrical waveform Square/triangular Square/triangular

Notes

a. Guaranteed if the ambient temperature stays between 15 °C to 30 °C.

b. In high-wavelength stability mode, better resolution is possible, but on a limited range.

c. Specified at 23 °C ± 1 °C with 50 % relative humidity.

d. After a 1-hour warmup period.

e. For 8 hours at 23 °C ± 1 °C with 50 % relative humidity.

f. Output power is specified at connector output.

g. Guaranteed at maximum power level.

h. Dithered modulation is only available internally at a typical duty cycle of 50 % duty cycle.

GENERAL SPECI FICATIONS

78 IQS-2400

B SCPI Command Reference

IQS controller or expansion unit

identification number (for example, 001)

Instrument slot number (0 to 9)

XXXY

This appendix presents detailed information on the commands and
queries supplied with your IQS-2400 WDM Laser Source.

IMPORTANT

Since the IQS controllers and expansion units can house many
instruments, you must explicitly specify which instrument you want
to remotely control.

You must add the following mnemonic at the beginning of any
command or query that you send to an instrument (except for
IEEE 488.2 and platform commands):

LINStrument<LogicalInstrumentPos>:
where <LogicalInstrumentPos> corresponds to the identification
number of the instrument.

For information on modifying unit identification, refer to your
platform user guide.

WDM Laser Source 79

SCPI Command Reference

Quick Reference Command Tree

Quick Reference Command Tree

Command Parameter(s) P.

CALibration[1..n] VALue <CalibrationValue[<wsp>DBM|W]> 83

SNUMber? 85

SOURce[1..n] ACCOutput <DeltaTemp>,<DeltaCurrent> 86

APCOutput <Wavelength[<wsp>M|HZ]>,<Power

CURRent ACCBase <ACCBase> 92

ACCBase? 94

BASE? 96

DELTa <Delta>|MAXimum|MINimum|DEFault 97

DELTa? [MAXimum|MINimum|DEFault] 99

LIMit LOW? 100

HIGH? 101

RESolution? 102

STEP? 103

POWer [LEVel] [IMMediate] [AMPLitude] <Power[<wsp>DBM|W]>|MAXimum

[AMPLitude]? [MAXimum|MINimum|DEFault] 106

LIMit LOW? 108

HIGH? 109

RESolution? 110

PROTection [HARDware] EXISt? 111

STATe? 112

RemovePassWorD 113

SetPassWorD <Password> 114

SOFTware EXISt? 115

STATe? 116

STATe <PowerState> 117

STATe? 118

STEP? 119

[<wsp>DBM|W]>

|MINimum|DEFault

89

104

80 IQS-2400

SCPI Command Reference

Quick Reference Command Tree

Command Parameter(s) P.

PULM INTernal DEPTh <DepthModulation> 120

DEPTh? 121

SHAPe SquareWave|TriangleWave 122

SHAPe? 123

FREQuency[1|2] <Frequency>|MAXimum|MINimum|

FREQuency[1|2]? [MAXimum|MINimum|DEFault] 126

LIMit DEPTh LOW? 129

HIGH? 130

STEP? 131

DELTa? 132

FREQuency [RANGe] LOW? <RangeIndex> 133

HIGH? <RangeIndex> 136

STEP? <RangeIndex> 139

RESolution? <RangeIndex> 141

COUNt? 143

DMIN? 145

DMAX? 146

OMIN? 147

OMAX? 148

SOURce INTernal|EXTernal 150

SOURce? 151

STATe <ModulationState> 152

STATe? 153

SETPoint <SetpointName>,APC|ACC 154

STABle? 156

DEFault

124

WDM Laser Source 81

SCPI Command Reference

Quick Reference Command Tree

Command Parameter(s) P.

TEMPerature PROTection LOW [LEVel]? 157

HIGH [LEVel]? 158

STEP? 159

RESolution? 161

DELTa? 163

CHannel? 164

WAVelength [CW] <Wavelength[<wsp>M|HZ]>|

[CW]? [MAXimum|MINimum|DEFault] 167

[CW] RESolution? 169

LIMit LOW? 170

HIGH? 171

STEP? 172

MODE NORMal|HRESolution 173

MODE? 174

STATus? 175

UNIT[1..n] POWer DBM|W 176

POWer? 177

SPECtrum M|HZ 178

SPECtrum? 179

MAXimum|MINimum|DEFault

165

82 IQS-2400

SCPI Command Reference

Product-Specific Commands—Description

Product-Specific Commands—Description

:CALibration[1..n]:VALue

Description This command is used to set the power

calibration value of the instrument. This
calibration value is used as a correction factor.

At *RST, the calibrated power is set to the factory
value.

Syntax :CALibration[1..n]:VALue<wsp>

<CalibrationValue[<wsp>DBM|W]>

Parameter(s) CalibrationValue:

The program data syntax for <CalibrationValue>
is defined as a <DECIMAL NUMERIC PROGRAM
DATA> element followed by an optional
<SUFFIX PROGRAM DATA> element. The
allowed <SUFFIX PROGRAM DATA> elements
are: DBM|W.

The <CalibrationValue> parameter represents
the new calibration value. If you do not specify a
unit, the device will use the current power units
(Watts or dBm). To select the current power units
use the UNIT[1..n]:POWer command.

Example(s) SOUR:PULM:STAT OFF

SOUR:WAV:MODE NORMAL
/* Under FDA jurisdiction, a password must be
entered before turning the laser on. */
SOUR:POW:PROT:SPWD "safekey"
SOUR:POW:STAT ON

WDM Laser Source 83

SCPI Command Reference

Product-Specific Commands—Description

Notes This command must not be used when the

:CALibration[1..n]:VALue

SOUR:STAB? (repeat until the returned value is
not 1)
SOUR:POW 5.0 DBM
CAL:VAL 5.1DBM

instrument is in High Wavelength Stability. To
determine the appropriate calibration value,
connect the source output to a power meter. The
power read by the power meter is the parameter
that should be entered with the
CALibration[1..n]:VALue command. To return
the device to its original factory calibration, use
the token DEFault.

The value used must not be more than 10 times
greater or less than 10 times lower than the
factory calibration value. An attempt to exceed
these limits will raise a “Parameter out of range”
error.

See Also UNIT[1..n]:POWer

SOURce[1..n]:WAVelength:MODE
SOURce[1..n]:PULM:STATe
SOURce[1..n]:POWer:PROTection:SetPassWorD
SOURce[1..n]:POWer:[:LEVel][:IMMediate][:AM
PLitude]

84 IQS-2400

SCPI Command Reference

Product-Specific Commands—Description

:SNUMber?

Description This query returns the module's serial number.

Syntax :SNUMber?

Parameter(s) None

Response Syntax <SerialNumber>

Response(s) SerialNumber:

The response data syntax for <SerialNumber> is
defined as a <STRING RESPONSE DATA>
element.

The <SerialNumber> response is a string
corresponding to the serial number of the
module.

Example(s) SNUM? Returns "123456-AB"

WDM Laser Source 85

SCPI Command Reference

Product-Specific Commands—Description

Description This command sets the delta temperature and

Syntax :SOURce[1..n]:ACCOutput<wsp><DeltaTemp>

:SOURce[1..n]:ACCOutput

the delta current of the laser.

At *RST, the delta current and delta temperature
are device-dependent.

,<DeltaCurrent>

Parameter(s)

³ DeltaTemp:

The program data syntax for <DeltaTemp> is
defined as a <DECIMAL NUMERIC PROGRAM
DATA> element.

The <DeltaTemp> parameter represents the
delta temperature of the laser in °C.

The value used must be equal to or between the
values returned by
SOURce[1..n]:TEMPerature:PROTection:LOW
[:LEVel]? and
SOURce[1..n]:TEMPerature:PROTection:HIGH
[:LEVel]?. The query
SOURce[1..n]:TEMPerature:PROTection:STEP?
returns the instrument sensitivity.

86 IQS-2400

SCPI Command Reference

Product-Specific Commands—Description

:SOURce[1..n]:ACCOutput

³ DeltaCurrent:

The program data syntax for <DeltaCurrent> is
defined as a <DECIMAL NUMERIC PROGRAM
DATA> element.

The <DeltaCurrent> parameter represents the
delta current of the laser in amperes.

The value used must be equal to or between the
values returned by
SOURce[1..n]:CURRent:LIMit:LOW? and
SOURce[1..n]:CURRent:LIMit:HIGH?. The
SOURce[1..n]:CURRent:STEP? query returns the
instrument sensitivity.

Example(s) SOUR:PULM:STAT ON

SOUR:WAV:MODE HRES
SOUR:ACCO 0.1,0.0001

WDM Laser Source 87

SCPI Command Reference

Product-Specific Commands—Description

Notes This command must only be used when the

See Also SOURce[1..n]:TEMPerature:PROTection:LOW

:SOURce[1..n]:ACCOutput

instrument is either in High Wavelength Stability
or On/Off modulation mode. If the instrument is
not in one of these modes, the parameters will
be read as a requested wavelength and a
requested power. This will generate the error
message: “Invalid instrument mode”.

[:LEVel]?
SOURce[1..n]:TEMPerature:PROTection:HIGH
[:LEVel]?
SOURce[1..n]:TEMPerature:PROTection:STEP?
SOURce[1..n]:TEMPerature:PROTection:
RESolution?

SOURce[1..n]:CURRent:LIMit:LOW?
SOURce[1..n]:CURRent:LIMit:HIGH?
SOURce[1..n]:CURRent:STEP?
SOURce[1..n]:CURRent:RESolution?
SOURce[1..n]:WAVelength:MODE
SOURce[1..n]:PULM:STATe

88 IQS-2400

SCPI Command Reference

Product-Specific Commands—Description

:SOURce[1..n]:APCOutput

Description This command is used to set the wavelength or

the frequency and the signal power.

At *RST, the power and the wavelength are
device-dependent.

Syntax :SOURce[1..n]:APCOutput<wsp><Wavelength

[<wsp>M|HZ]>,<Power[<wsp>DBM|W]>

Parameter(s)

³ Wav elen gth:

The program data syntax for <Wavelength> is
defined as a <DECIMAL NUMERIC PROGRAM
DATA> element followed by an optional
<SUFFIX PROGRAM DATA> element. The
allowed <SUFFIX PROGRAM DATA> elements
are: M|HZ.

The <Wavelength> parameter is a new
wavelength (in meters) or the new frequency (in
HZ). If you do not specify a unit, the device will
use the current spectrum units. To select the
current power units, use the
UNIT[1..n]:SPECtrum command.

WDM Laser Source 89

SCPI Command Reference

Product-Specific Commands—Description

:SOURce[1..n]:APCOutput

The value used must be equal to or between the
values returned by
SOURce[1..n]:WAVelength:LIMit:LOW? and
SOURce[1..n]:WAVelength:LIMit:HIGH?. The
SOURce[1..n]:WAVelength:LIMit:STEP? query
returns the instrument sensitivity.

³ Power:

The program data syntax for <Power> is defined
as a <DECIMAL NUMERIC PROGRAM DATA>
element followed by an optional <SUFFIX
PROGRAM DATA> element. The allowed
<SUFFIX PROGRAM DATA> elements are:
DBM|W.

The <Power> parameter represents a new
power of the signal in watts or dBm. If you do not
specify a unit, the device will use the current
power unit. To select the current power unit, use
the UNIT[1..n]:POWer command.

The value used must be equal to or between the
values returned by
SOURce[1..n]:POWer:LIMit:LOW? and
SOURce[1..n]:POWer:LIMit:HIGH?. The
SOURce[1..n]:POWer:STEP? query returns the
instrument sensitivity.

Example(s) SOUR:PULM:STAT ON

SOUR:WAV:MODE NORMAL
SOUR:APCO 1547nm ,7.39DBM

90 IQS-2400

SCPI Command Reference

Product-Specific Commands—Description

:SOURce[1..n]:APCOutput

Notes This command must only be used when the

instrument is either in Normal mode or Dither
mode. If the instrument is not in one of these
modes, the parameters will be read as a
requested delta temperature and a requested
delta current. This will generate the following
error message: “Invalid instrument mode”.

See Also UNIT[1..n]:POWer

SOURce[1..n]:POWer:LIMit:LOW?
SOURce[1..n]:POWer:LIMit:HIGH?
SOURce[1..n]:POWer:STEP?
SOURce[1..n]:WAVelength:LIMit:LOW?
SOURce[1..n]:WAVelength:LIMit:HIGH?

SOURce[1..n]:WAVelength:LIMit:STEP?
SOURce[1..n]:WAVelength:MODE
SOURce[1..n]:PULM:STATe

WDM Laser Source 91

SCPI Command Reference

Product-Specific Commands—Description

Description This command is used to set the ACC base

Syntax :SOURce[1..n]:CURRent:ACCBase<wsp>

Parameter(s) ACCBase:

:SOURce[1..n]:CURRent:ACCBase

current. The base current is the actual current of
the laser. For this command to function properly,
the instrument must be in High Wavelength
Stability or On/Off modulation mode and the
SOURce[1..n]:STABle? query must return 1
(stable). Normally, this command would rarely
be used.

*RST has no effect on this command.

<ACCBase>

The program data syntax for <ACCBase> is
defined as a <DECIMAL NUMERIC PROGRAM
DATA> element.

The <ACCBase> parameter is the desired
current of the instrument in amperes.

Example(s) SOUR:PULM:STATE OFF

SOUR:WAV:MODE HRES
/* Under FDA jurisdiction, a password must be
entered before turning the laser on. */
SOUR:POW:PROT:SPWD "safekey"
SOUR:POW:STAT ON

92 IQS-2400

SCPI Command Reference

Product-Specific Commands—Description

:SOURce[1..n]:CURRent:ACCBase

SOUR:STAB? (repeat until the returned value is
not 1)
SOUR:CURR:ACCB 0.0854

Notes The current properties of the laser may change

with time. For this reason, if a setpoint was
defined in High Wavelength Stability or On/Off
modulation mode, and you want to return to it at
a later date, the wavelength and power may
differ from those defined with the current step
and temperature step when the setpoint was
created. To cancel this effect, when creating a
setpoint in these modes, the base current is
recorded internally. This base current is sent to
the instrument when returning to the mentioned
setpoint. All this is done automatically and is
transparent to the user.

See Also SOURce[1..n]:CURRent:ACCBase?

SOURce[1..n]:STABle?
SOURce[1..n]:WAVelength:MODE
SOURce[1..n]:WAVelength:MODE?

WDM Laser Source 93

SCPI Command Reference

Product-Specific Commands—Description

:SOURce[1..n]:CURRent:ACCBase?

Description This query returns the ACC base current. For this

Syntax :SOURce[1..n]:CURRent:ACCBase?

Parameter(s) None

Response Syntax <ACCBase>

Response(s) ACCBase:

query to function properly, the instrument must
be in High Wavelength Stability or On/Off
modulation mode and the SOURce[1..n]:STABle?
query must return 1 (stable).

*RST has no effect on this command.

The response data syntax for <ACCBase> is
defined as a <NR3 NUMERIC RESPONSE DATA>
element.

The <ACCBase> response is a value
representing the ACC base current in amperes.

Example(s) SOUR:PULM:STATE OFF

SOUR:WAV:MODE HRES
/* Under FDA jurisdiction, a password must be
entered before turning the laser on. */
SOUR:POW:PROT:SPWD "safekey"
SOUR:POW:STAT ON

94 IQS-2400